A novel 3D self-supported integrated electrode of Co4N@CoSA/N-CNT/CC is designed for admirable HER electrocatalysis. Experiment and theory studies reveal that the suitable d-band center and electron-charge transfer optimized by Co4N nanoparticles and single-atom Co in the electrocatalyst contribute to an excellent performance. This electrode requires overpotentials of only 78 and 86 mV at 10 mA cm−2 in acidic and basic electrolytes, respectively. Notably, Co4N@CoSA/N-CNT/CC also exhibits superior long-term stability in acidic and alkaline medium, the decrease in current density after continuous electrocatalysis for 50 h are only 5% and 11%, respectively.
- Bo Cao
- Minghao Hu
- Jun Zhang